iankellogg
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« Reply #30 on: March 01, 2015, 08:46:09 pm » |
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Did you remove the hot before testing it? If you didn't you need to go back, remove it and retest.
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bfrosty
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« Reply #31 on: March 05, 2015, 09:06:28 pm » |
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Yes!
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VertexGuy
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« Reply #32 on: March 06, 2015, 12:23:35 am » |
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It's broken.. that's whats wrong .
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bfrosty
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« Reply #33 on: March 06, 2015, 01:39:12 pm » |
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Funny!
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bfrosty
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« Reply #34 on: March 07, 2015, 09:31:24 pm » |
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Hey Vertex and John,
Finally got a new HOT on this Sanyo.
Picture comes up, but scrambled....color looks good, coins up, sound works great.
I can't get the screen to unscramble and the monitor goes off after about 30secs of power.
So, I checked the B+ and I'm hitting 127vDC.....I know it suppose to be 108vDC.
Tried adjusting the B POT....and it goes up to 137vDC....but when I turn it the opposite way I can only bring it down to about 126vDC.
There was some white glue...but it flaked away.
Is the B-POT bad? Can it be replaced? Is there something else I can check?
Thanks, MK
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bfrosty
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« Reply #35 on: March 07, 2015, 09:34:18 pm » |
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Okay....
Looks like Q901 needs to be replaced.
Where is that? Is it another Transistor?
Thanks, Mitch
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bfrosty
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« Reply #36 on: March 07, 2015, 09:40:18 pm » |
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Found it....right next to the B+ pot.
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bfrosty
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« Reply #37 on: March 08, 2015, 11:07:13 am » |
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Does anyone know the part # or item # for this transistor? It's got a screw hole in the top and 3-legs. Guessing BCE.
Thanks, Mitch
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VertexGuy
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« Reply #38 on: March 08, 2015, 01:41:49 pm » |
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I aint gonna lie, im not that good with ez20's Never had one flake out on me so ive never had to trouble shoot one.
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iankellogg
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« Reply #39 on: March 08, 2015, 01:54:23 pm » |
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Does anyone know the part # or item # for this transistor? It's got a screw hole in the top and 3-legs. Guessing BCE.
Thanks, Mitch
2SD1090, 2SD931, or 2SC3153
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bfrosty
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« Reply #40 on: March 08, 2015, 05:42:36 pm » |
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Okay Ian - so any of those would work?
I'm gonna CAP kit it too while I have it all apart.
Already CAPPED the audio board....not bad...just took some time.
Thanks MK
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bfrosty
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« Reply #41 on: March 14, 2015, 10:11:10 pm » |
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Good News -
Put all my Caps in, read the b+ and adjusted to 108vdc.
Adjusted H Hold...and....
BINGO!!! A great stable image of Mario Bros. Sound works great too.
Played it for a couple hours and was rock solid.
Now, just need a new CPO and Sideart. Also, the plastic t-mold has turned very brittle. Anyone know of a good place online to pick all this up?
Thanks for everyone's help. I greatly appreciate everyone here helping me out. MK
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kkcloak
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« Reply #42 on: February 19, 2016, 08:40:11 am » |
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Okay, try follow me here...
So, I thought, Humm...I will check all the fuses and test for continuity. All 4 fuses checked out except for the .3A on the monitor.
9-Pin connector Color Spec Actual Reading Blue +5 +5.22 Purple +5 +5.22 Yellow +12 +12 Green +12 +12 Gray -5.13 -5 White +24 +23.58 Brown Ground Red Ground Orange Ground
10-Pin Connector Color Spec Actual Reading Brown -5 -5.14 Red -5 -5.13 Orange -5 -5.14 Yellow -5 -5.14 Green Ground Blue Ground Purple Ground Gray Ground White +5 +5.22 Black +5 +5.22
is there really 4 fuses, i know there one at the switch, one in the power supply and one on the monitor but where is number 4? mine has been dead for 3 months now :p edit: i have power at the monitor and marquee but no power to the pcb.
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